تفاصيل الوثيقة نوع الوثيقة : مقال في مجلة دورية  عنوان الوثيقة : Nonisothermal decomposition of CdC2O4-FeC2O4 mixtures in air Nonisothermal decomposition of CdC2O4-FeC2O4 mixtures in air   لغة الوثيقة : العربية  المستخلص : DTA-TG, XRD, and (57) Fe Mossbauer spectral measurements were used to study the thermal decomposition reactions of the system CdC2O4-FeC2O4 (1:2 mole ratio) in air. The results showed that the thermal oxidative decomposition of each metal oxalate in the mixture occurs in one TG step and that oxide spinel is formed at 800 degreesC. Mossbauer spectra of samples showed that the iron(III) oxide formed in the early stages of the decomposition at 250 degreesC is mainly fine-grained and as the temperature is increased, well-crystalline hematite is formed. Above 250 degreesC, the Mossbauer spectrum showed the typical six-line pattern of magnetically oriented Fc(III) oxide, but at 800 degreesC, the spectrum showed quadrupole interaction characteristic of CdFe2O4 spinel. Kinetic analysis of the nonisothermal data according to the integral composite method showed that the oxidation and decomposition of FeC2O4 to Fe2O3 and CO2 and of CdC2O4 to CdO and CO2 are best described by the three-dimensional phase boundary (R-3) model. The activation parameters for both decomposition steps were calculated and discussed.  اسم الدورية : THERMOCHIMICA ACTA  المجلد : 376  العدد : 1  سنة النشر : 2001 هـ   تاريخ الاضافة على الموقع : Monday, June 23, 2008  الباحثون اسم الباحث (عربي) اسم الباحث (انجليزي) نوع الباحث المرتبة العلمية البريد الالكتروني . Diefallah EHM باحث     د. محمد عبد الفتاح محممد جبل Gabal MA باحث     . El-Bellihi AA باحث     . Eissa NA باحث     الرجوع إلى صفحة الأبحاث